Observations on Arrhenius Degradation of Lithium-Ion Capacitors
Observations on Arrhenius Degradation of Lithium-Ion Capacitors作者机构：Moye Consultants 527 E. Park Ave Tallahassee FL USA Greencastle Sustainable Electrical Energy Systems Tallahassee FL USA Department of Electrical and Computer Engineering Florida A&M University and Florida State University Tallahassee FL USA
出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)
年 卷 期：2020年第11卷第7期
页 面：450-461页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
主 题：Arrhenius Equation Cycle Life Cycle Life Degradation Lithium-Ion Capacitor Butler-Volmer Equation Activation Energy
摘 要：Earlier research determined that lithium-ion capacitor (LIC) cycle life degradation can be accelerated by elevated temperature. LIC cycle life degradation can be described by an Arrhenius equation. This study performed cycle life testing at a constant temperature but varied cycle current. The results were described by an Arrhenius equation relying upon the number of cycles and a constant, which was determined by cycle current. Using mathematical derivations and experimental results, the researchers quantified the effects of activation energy and temperature upon this constant. Because cell temperature is nearly constant during cycles, it was deduced that elevated cycle current decreases activation energy. This lower activation energy then accelerates degradation. Thus this research demonstrates that cycle current ages LICs through its effects on their activation energies.
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